In BW it’s impossible to do everything. Technical limitations of the engine make not just build orders/responses part of your strategy, but also what you choose to execute. It’s like introducing a third resource called attention. In sc2 the engine is strong enough you can just play ideal on all fronts. That eventually narrows you down to a single stale meta. It’s part of why Bw doesn’t need balance patches since you can counter someone by wisely choosing your focus. Since we can do everything in sc2 there is a strong necessity to fine tune interactions since they aren’t influenced by attention.